Fitting of Brillouin Spectrum Based on LabVIEW

Author

Li, Chengbin ; Li, Yongqian

Author_Institution

Dept. of Electron. & Commun. Eng., North China Electr. Power Univ., Baoding, China

fYear

2009

fDate

24-26 Sept. 2009

Firstpage

1

Lastpage

4

Abstract

The characteristics of Brillouin scattering spectrum has been analyzed. The nonlinear least square algorithm based on Levenberg-Marquardt has been researched. In view of the characteristics that Brillouin frequency spectrum shows a Lorentzian distribution, Lorentzian curve fitting was achieved based on Levenberg-Marquardt nonlinear least square algorithm in Lab VIEW, and the fitting results have been compared based on different initial coefficients, the result showed that the setting of initial value had enormous influence on the fitting result. And also simulation curve fitting of Brillouin spectrum has also been performed in MATLAB. Finally, comparison of both results showed that it will be more precise and more efficient to fit curve if combining Lab VIEW with MATLAB.

Keywords

Brillouin spectra; curve fitting; fibre optic sensors; least squares approximations; optical computing; Brillouin frequency spectrum; Brillouin scattering spectrum; Brillouin spectrum fitting; LabVIEW; Lorentzian distribution; MATLAB; curve fitting; nonlinear least square algorithm; Brillouin scattering; Curve fitting; Frequency measurement; Least squares methods; MATLAB; Optical fibers; Strain measurement; Temperature distribution; Temperature measurement; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-3692-7

Electronic_ISBN

978-1-4244-3693-4

Type

conf

DOI

10.1109/WICOM.2009.5303692

Filename

5303692